DaveinOlyWA wrote:But for you, your pack would take forever to cool off and it simply won't cool down enough. Someone mentioned that the packs have air ventilation coming from the front of the car. Wondering if determining its inlet and putting a fan on it would make a difference?

Been there, done that...and it didn't make a bit of difference.Based on early forum discussions, I put a big fan at the front of my Leaf (before I ever lost my first bar) and ran it any night I saw 7TB when I got home from work (which was about 2-3 months out of the year). Result: I qualified for my (free) battery pack well before my capacity warranty had expired.We can speculate about where/when I chose to run the fan, but I think the simple answer was: the garage is just too hot in the TX summer to allow the pack to ever really cool...and I'm not going to put A/C in my garage (and I'm not going to park my Leaf outside overnight--not that it would have made a difference).

DaveinOlyWA wrote:But for you, your pack would take forever to cool off and it simply won't cool down enough. Someone mentioned that the packs have air ventilation coming from the front of the car. Wondering if determining its inlet and putting a fan on it would make a difference?

Been there, done that...and it didn't make a bit of difference.Based on early forum discussions, I put a big fan at the front of my Leaf (before I ever lost my first bar) and ran it any night I saw 7TB when I got home from work (which was about 2-3 months out of the year). Result: I qualified for my (free) battery pack well before my capacity warranty had expired.We can speculate about where/when I chose to run the fan, but I think the simple answer was: the garage is just too hot in the TX summer to allow the pack to ever really cool...and I'm not going to put A/C in my garage (and I'm not going to park my Leaf outside overnight--not that it would have made a difference).

First off are we talking about 30 kwh packs?

Actually it likely wouldnt. Guessing the air flow is highly restricted so a fan blowing into the front would be limited. I think the best bet is determining where the air flow outlet is and putting a fan there to create negative pressure. I am collecting data that implies that the front sensor is getting a lot more air flow cooling than the rear sensor which means air flow is not sufficient despite running at highway speeds in cool weather so during warm weather, there is no chance.

DaveinOlyWA wrote:But for you, your pack would take forever to cool off and it simply won't cool down enough. Someone mentioned that the packs have air ventilation coming from the front of the car. Wondering if determining its inlet and putting a fan on it would make a difference?

Been there, done that...and it didn't make a bit of difference.Based on early forum discussions, I put a big fan at the front of my Leaf (before I ever lost my first bar) and ran it any night I saw 7TB when I got home from work (which was about 2-3 months out of the year). Result: I qualified for my (free) battery pack well before my capacity warranty had expired.We can speculate about where/when I chose to run the fan, but I think the simple answer was: the garage is just too hot in the TX summer to allow the pack to ever really cool...and I'm not going to put A/C in my garage (and I'm not going to park my Leaf outside overnight--not that it would have made a difference).

I'm not surprised to hear that a fan in a garage was ineffective. Was the garage door closed ?

2013 Model 'S' with QC & rear-view cameraBought off-lease Jan 2017 from N. California with 63.9 Ahr after 22k milesCar is now enjoying an easy life in Colorado

DaveinOlyWA wrote:But for you, your pack would take forever to cool off and it simply won't cool down enough. Someone mentioned that the packs have air ventilation coming from the front of the car. Wondering if determining its inlet and putting a fan on it would make a difference?

Been there, done that...and it didn't make a bit of difference.Based on early forum discussions, I put a big fan at the front of my Leaf (before I ever lost my first bar) and ran it any night I saw 7TB when I got home from work (which was about 2-3 months out of the year). Result: I qualified for my (free) battery pack well before my capacity warranty had expired.We can speculate about where/when I chose to run the fan, but I think the simple answer was: the garage is just too hot in the TX summer to allow the pack to ever really cool...and I'm not going to put A/C in my garage (and I'm not going to park my Leaf outside overnight--not that it would have made a difference).

I'm not surprised to hear that a fan in a garage was ineffective. Was the garage door closed ?

agreed. Didn't someone rig up AC in their garage in Phoenix to cool the garage to like 90 (I guess "some" people would call that cool... ) and it didn't help either?

I think any cooling has to be directly connected to the battery pack itself.

DaveinOlyWA wrote:I think any cooling has to be directly connected to the battery pack itself.

It surely does not help to move hot air around.

Since driving does keep the battery temps down, ventilation must play a part in battery cooling but the battery will never cool down lower than ambient, thus the need to put the car outside, not on toasty asphalt, and not in the sun. I would not be surprised at all to find that the owners with the most severe battery degradation stories are in hot climates with garaged cars.

2013 Model 'S' with QC & rear-view cameraBought off-lease Jan 2017 from N. California with 63.9 Ahr after 22k milesCar is now enjoying an easy life in Colorado

DaveinOlyWA wrote:I think any cooling has to be directly connected to the battery pack itself.

It surely does not help to move hot air around.

Since driving does keep the battery temps down, ventilation must play a part in battery cooling but the battery will never cool down lower than ambient, thus the need to put the car outside, not on toasty asphalt, and not in the sun. I would not be surprised at all to find that the owners with the most severe battery degradation stories are in hot climates with garaged cars.

It doesn't if the air is as hot or hotter. In my case, the weather is warm, radiant heat adds another 10+º, but all of that does not add up to the fact my pack has hit 125+ 3 days in a row...

It's the end of May and I'm down to 300 GID's. Stats are AHr=65.70 SOH=82% Hx=75.84% 28051 mi 44 QCs and 521 L2. The first bar continues to come and go. 11 bars after a full charge but after driving 30 minutes it shows 12 bars again and stays that way until I charge it again.